CN220766518U

CN220766518U - Crude potassium nitrate purification system

Info

Publication number: CN220766518U
Application number: CN202322027740.1U
Authority: CN
Inventors: 熊佳义
Original assignee: Hunan Meiao Potassium Industry Co ltd
Current assignee: Hunan Meiao Potassium Industry Co ltd
Priority date: 2023-07-31
Filing date: 2023-07-31
Publication date: 2024-04-12
Anticipated expiration: 2033-07-31

Abstract

The utility model provides a crude potassium nitrate purification system which comprises a feeding device, a leaching device, a vacuum liquid discharge device and a vacuumizing device, wherein the leaching device is connected with the feeding device; the feeding device is a horizontal material conveying section from a feeding end to a discharging end; the leaching devices are multiple in number, and leaching solution outlets of the multiple leaching devices are arranged above the feeding device from the feeding end to the discharging end; the plurality of vacuum liquid draining devices are used for respectively pumping the leacheate which is leached by the leaching device on the feeding device, and taking the pumped leacheate as the feed of the previous leaching device so as to form countercurrent flow of the leacheate and the feeding direction of the feeding device; the vacuumizing device is connected with each vacuum liquid draining device and is used for providing a vacuum environment for the vacuum liquid draining devices. The utility model controls the multi-section material conveying sections based on the arrangement of a plurality of leaching devices, thereby improving the control of the purity of the product; and the leacheate flows reversely with the materials, so that the consumption of the leacheate is reduced.

Description

Crude potassium nitrate purification system

Technical Field

The utility model relates to the field of purification equipment, in particular to a crude potassium nitrate purification system.

Background

Potassium nitrate is a raw material for making black powder, such as mine powder, firing line, firecracker, etc., and is also used for firework to generate purple spark, mechanical heat treatment is used as salt bath for quenching, and ceramic industry is used for making enamel color powder. Used as a glass clarifying agent for manufacturing automobile lamp glass shells, optical glass kinescope glass shells and the like. The industry generally obtains a solution containing crude potassium nitrate crystals, and then purifies the crude potassium nitrate solution to obtain a potassium nitrate product with high purity. At present, the industrial production generally adopts a manual or mechanical flushing mode to remove the impurities (such as ammonium chloride, ammonium nitrate and potassium chloride) in the crude potassium nitrate, and the mode has large water consumption and is time-consuming and labor-consuming. The above problems are to be solved.

Disclosure of Invention

In order to solve the problems in the background technology, the utility model provides a crude potassium nitrate purification system which comprises a feeding device, a leaching device, a vacuum liquid discharge device and a vacuumizing device; the feeding device is a horizontal material conveying section from a feeding end to a discharging end; the leaching devices are multiple in number, and leaching solution outlets of the multiple leaching devices are arranged above the feeding device from the feeding end to the discharging end; the number of the vacuum liquid draining devices is more than one, and each vacuum liquid draining device is respectively used for pumping the leacheate which is leached by the leaching device on the feeding device, and taking the pumped leacheate as the feed of the previous leaching device so as to form the countercurrent flow of the leacheate and the material conveying direction of the feeding device; the vacuumizing device is connected with each vacuum liquid draining device and is used for providing a vacuum environment for the vacuum liquid draining devices.

In the crude potassium nitrate purification system, the vacuum liquid draining device comprises a vacuum tank and liquid collecting equipment; the feeding port of the vacuum tank is connected to the liquid outlet end at the bottom of the feeding device through a pipeline, the air inlet of the vacuum tank is communicated to the vacuumizing device through an air inlet pipeline, and the liquid outlet of the vacuum tank is communicated to the liquid collecting device through a liquid outlet pipeline; the liquid in the liquid collecting device is used as the feed of the leaching device; the vacuumizing and draining processes of the vacuum tank are staggered.

In the crude potassium nitrate purification system, control valves are respectively arranged on the air inlet pipeline and the liquid outlet pipeline of the vacuum tank.

In the crude potassium nitrate purification system, the feeding device comprises a first conveying belt, a second conveying belt and a bracket; the first conveying belt and the second conveying belt are respectively arranged on the bracket, the first belt body of the first conveying belt is made of breathable materials, is annularly arranged on the outer side of the second conveying belt and is used for supporting crude potassium nitrate materials; the second belt body of the second conveying belt supports the first belt body loaded with the crude potassium nitrate material, and the second belt body is provided with liquid leakage holes; and the vacuum liquid draining device pumps out the eluent through the liquid leakage hole.

In the crude potassium nitrate purification system of the present utility model, the number of the leaching devices is 5.

In the crude potassium nitrate purification system, the leaching device comprises a liquid distribution pipe and a liquid supply pump; the liquid supply pump is used for conveying the leaching solution pumped by the vacuum liquid discharge device to the liquid distribution pipe; the liquid distribution pipe is arranged above the feeding device and is provided with a liquid outlet.

In the crude potassium nitrate purification system, the extension direction of the liquid distribution pipe is perpendicular to the feeding direction of the feeding device; the liquid outlet is uniformly distributed with a plurality of liquid distribution pipes along the extending direction of the liquid distribution pipes.

In the crude potassium nitrate purification system, a control valve is arranged on the liquid distribution pipe.

In the crude potassium nitrate purification system, the vacuumizing device is a vacuum pump.

In the crude potassium nitrate purification system, the feeding end of the feeding device is provided with the vacuum liquid draining device so as to drain the eluent.

The beneficial effects of the utility model are as follows: the crude potassium nitrate purification system provided by the utility model is based on the arrangement of a plurality of leaching devices, and the material conveying sections of the feeding device are divided into a plurality of sections, so that the plurality of sections of material conveying sections can be controlled respectively, and the control on the purity of products is improved; the leaching device and the vacuum liquid draining device are matched to form countercurrent flow of the leaching liquid and the materials, so that the dosage of the leaching liquid can be reduced; compared with manual operation, the utility model can save labor, time and labor.

Drawings

FIG. 1 is a schematic diagram of the purification system of the present utility model;

FIG. 2 is a schematic diagram of the structure of a crude potassium nitrate discharge tank of the present utility model;

FIG. 3 is a schematic structural view of the stirring paddle of the crude potassium nitrate discharge tank of the present utility model;

FIG. 4 is a schematic diagram of the front view of the crude potassium nitrate purification system of the present utility model;

FIG. 5 is a schematic top view of the crude potassium nitrate purification system of the present utility model;

FIG. 6 is a schematic diagram of the structure of a second conveyor belt of the crude potassium nitrate purification system of the present utility model;

FIG. 7 is a schematic diagram of the structure of a feeding device with a backing roll of the crude potassium nitrate purification system of the present utility model.

Legend: 1. a feeding device; 11. a first conveyor belt; 111. a first belt body; 12. a second conveyor belt; 121. a second belt body; 122. a weeping hole; 13. a bracket; 2. a rinsing device; 21. a liquid distribution pipe; 22. a liquid supply pump; 3. a vacuum liquid discharge device; 31. a vacuum tank; 32. a liquid collecting device; 4. a vacuum pumping device; 5. a distribution chute; 6. crude potassium nitrate discharge tank; 61. a tank body; 611. a feed inlet; 612. a discharge port; 613. an overflow port; 62. a stirrer; 621. a motor; 622. a rotating shaft; 623. stirring paddles; 6231. a first blade; 6232. a second blade; 6233. a third blade; 63. a feed guide; 64. a first region; 65. an annular region; 66. a bracket; A. a crude potassium nitrate purification system.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The term "plurality" in the description and claims of the present application or in the above-mentioned figures refers to more than two (including two).

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The crude potassium nitrate purification system of the present application is described in detail below with reference to the accompanying drawings.

As shown in fig. 1, a purification system comprises the above-mentioned crude potassium nitrate discharge tank 6 and a crude potassium nitrate purification system a; the material flowing out of the discharge port 612 of the crude potassium nitrate discharge tank 6 flows into the feed end of the purification system a.

Wherein, as shown in fig. 2, the crude potassium nitrate discharge tank 6 comprises a tank body 61, a stirrer 62 and a feed guide 63; at least a portion of the feed guide 63 is located within the tank 61 (either the discharge side of the optional feed guide 63 is located within the tank 61, or the feed guide 63 is located entirely within the tank 61), and the space within the tank 61 includes at least a first region 64 located between the bottom end of the feed guide 62 and the inner bottom surface of the tank 61, and an annular region 65 (the particular annular region 65 being located vertically above the first region 64) in communication with the first region 64 and located between the inner wall of the tank 61 and the feed guide 62; the feed guide 63 has an inlet and an outlet; the outlet communicates with the first region 64; the tank 61 is provided with a feed port 611, a discharge port 612 and an overflow port 613; the feed port 611 (if an open tank is selected, the top opening is the feed port 611) is communicated with the inlet; the discharge port 612 is communicated with the first region 64; the overflow port 613 communicates with the annular region 65 (the particular overflow port 613 is located vertically between the inlet and outlet of the feed guide 63); the agitator 62 is used to agitate the material in the first region 64 and the annular region 65.

The crude potassium nitrate discharging tank guides the feeding position of the crude potassium nitrate raw material based on the feeding guide piece, and guides the raw material into the first area; the space in the tank body is divided into a first area and an annular area again based on the feeding guide piece, the two areas are stirred by matching with the stirrer, and the ammonium chloride solution (the density of the ammonium chloride solution is smaller) in the crude potassium nitrate raw material is discharged from the overflow port (based on the fact that the crude potassium nitrate raw material is directly introduced into the first area 64, the raw material is dispersed under the action of the stirrer, wherein the material with small density flows to the annular area, and the material left in the first area can be uniformly dispersed under the action of the stirrer, so that the solid-to-liquid ratio of the discharged material is kept consistent), so that the load of the subsequent purification process is reduced on the one hand; on the other hand, the problem that the discharging is difficult due to the fact that the solid-liquid ratio of materials output by a discharging hole is too large is avoided, and the normal operation of a subsequent purification system A is affected if the solid-liquid ratio is changed greatly.

In some embodiments, the tank 61 is a vertical tank, and the feeding guide 62 is a cylindrical structure with an open top and an open bottom (the open top is an inlet, and the open bottom is an outlet), and is coaxially disposed with the tank 61 and fixedly connected to the inner wall of the tank 61. Specifically, the axis of the feed guide 62 is vertical.

In some embodiments, canister 61 is a conical canister with a conical bottom and an open top; with this configuration, the bottom tapered portion is contained within the first region 64 and the discharge port 612 is disposed at the bottom end of the tapered portion to facilitate the discharge of the liquid-solid mixture.

In some embodiments, stirrer 62 includes motor 621, shaft 622, and paddle 623; the motor 621 is fixedly arranged, and the rotating end is fixedly connected with the rotating shaft 622; paddles 623 are connected to shaft 622 and are at least partially located within annular region 65; specifically, the top end of the paddle 623 abuts the overflow port 613.

Preferably, as shown in fig. 3, the stirring paddle 623 is plural in number; the stirring paddles 623 are circumferentially arranged at intervals along the rotating shaft 622; based on the arrangement of the plurality of stirring paddles 623, stirring efficiency is improved.

In the above embodiment, in particular, the stirring paddle 623 includes the first blade 6231 and the second blade 6232; the first blade 6231 is located in the first region 64, and has one end connected to the rotation shaft 622 and the other end connected to one end of the second blade 6232; the other end of the second paddle 6232 is located within the annular region 65, the second paddle 6232 moving within the annular region 65 when in operation; specifically, the rotation shaft 622 is disposed coaxially with the can 61. Stirring the first region 64 based on the first blade 6231 to avoid raw material precipitation in the region and ensure uniform liquid-solid ratio of discharged materials; the chicken paddles 6232 stir the annular region 65, and solid materials in the raw materials flowing into the annular region 65 flow to the inner wall of the tank 61 based on centrifugal rotation solid materials formed by stirring, so that the solid materials sink into the first region, and the potassium nitrate is prevented from losing.

Preferably, the paddle 623 also includes a third paddle 6233; the third blade 6233 is located in the first region 64, and has one end connected to the first blade 6231 and the other end connected to the rotating shaft 622; based on the setting of third paddle 6233, strengthened the stirring dynamics to first region 64, further avoided the raw materials in the first region to take place to precipitate, guaranteed that the material solid-liquid ratio of discharge gate outflow is unanimous.

Further preferably, the first paddle 6231 is disposed parallel to the bottom surface of the first region 64; in this way, the material at the bottom of the first region 64 is more thoroughly stirred, avoiding the material from sinking.

In some embodiments, the crude potassium nitrate discharge tank further comprises a stand 66; the bracket 66 is used for supporting the tank 61 to a certain height, and the specific height value is determined according to actual requirements, for example: the vertical height of the material outlet is higher than the height of the feeding end of the subsequent process by the height of the stand, so that the material is discharged by the gravity of the raw material.

As shown in fig. 4, the crude potassium nitrate purification system A comprises a feeding device 1, a leaching device 2, a vacuum liquid discharging device 3 and a vacuumizing device 4; the feeding device 1 is a horizontal conveying section from a feeding end to a discharging end; the number of the leaching devices 2 is plural (for example, 5 leaching devices are arranged, or more leaching devices are arranged to obtain better purification effect), and leaching liquid outlets of the leaching devices 2 are arranged above the feeding device 1 (in particular, above a material conveying section for conveying crude potassium nitrate) from the feeding end to the discharging end of the feeding device 1; the number of the vacuum liquid discharging devices 3 is more than one, each vacuum liquid discharging device 3 is respectively used for extracting the leacheate which is leached by the leaching device 2 on the feeding device 1, the extracted leacheate is used as the previous one (the leacheate is ordered according to the feeding direction of the feeding device 1, for example, the order is 1-N, the current leaching device is N, the previous one is N-1), the feeding of the leaching device 2 is carried out, so as to form countercurrent flow of the leacheate and the feeding direction of the feeding device 1, wherein the vacuum liquid discharging device 3 with the number of 1 conveys the extracted leacheate to a material distributing groove 5 at a feeding end (the bottom surface of the material distributing groove 5 is provided with a material outlet, the material flowing out from the material outlet falls onto the feeding device 1, and the material outlet is communicated with the material outlet 612), and the raw materials are mixed with the raw potassium nitrate to wash; the vacuumizing device 4 is connected with each vacuum liquid draining device 3 and is used for providing a vacuum environment for the vacuum liquid draining devices 3; the evacuation device 4 may alternatively be a vacuum pump.

The crude potassium nitrate purification system provided by the utility model is based on the arrangement of a plurality of leaching devices, and the material conveying sections of the feeding device are divided into a plurality of sections, so that the plurality of sections of material conveying sections can be controlled respectively, and the control on the purity of products is improved; the leaching device and the vacuum liquid draining device are matched to form countercurrent flow of the leaching liquid and the material, and a process similar to countercurrent mass transfer is formed, so that the dosage of the leaching liquid can be reduced, and meanwhile, the purification effect is ensured (the purity of the purified potassium nitrate is controlled by adjusting the leaching liquid, and a plurality of leaching devices can be respectively controlled to effectively control the final purity); compared with manual operation, the utility model can save labor, time and labor.

In some embodiments, as shown in fig. 4, the vacuum drain 3 includes a vacuum tank 31 and a liquid collecting device 32 (e.g., a liquid collecting tank or tank); the feeding hole of the vacuum tank 31 is connected to the bottom liquid outlet end of the feeding device 1 through a pipeline, specifically, the bottom liquid outlet end of the feeding device 1 is a liquid outlet hole, the feeding hole of the vacuum tank 31 is in sealing connection with the liquid outlet hole through a pipeline (for example, a sealing gasket is arranged between the end part of the pipeline and the bottom of the feeding device 1, wherein the sealing gasket is fixed at the end part of the pipeline, so that the end part of the pipeline and the bottom of the feeding device 1 can be sealed relatively under the action of negative pressure when vacuumizing is performed, and the feeding of the feeding device 1 is not influenced; the air inlet of the vacuum tank 31 is communicated to the vacuumizing device 4 through an air inlet pipeline, and the liquid outlet of the vacuum tank 31 is communicated to the liquid collecting equipment 32 through a liquid outlet pipeline; the liquid in the liquid collecting device 32 is used as the feed of the leaching device 2; the vacuumizing and draining processes of the vacuum tank 31 are staggered, namely, when vacuumizing operation is performed, no draining is performed; and stopping vacuumizing operation when liquid discharge is performed. Specifically, control valves are respectively arranged on the air inlet pipeline and the liquid outlet pipeline of the vacuum tank 31 so as to realize staggered vacuum pumping and liquid discharging, the control valves can be manually operated and controlled by programs, and the implementation mode of specific program control can refer to the prior art.

In some embodiments, as shown in fig. 4, 6 and 7, the feeding device 1 includes a first conveyor belt 11, a second conveyor belt 12 and a bracket 13; the first conveyer belt 11 and the second conveyer belt 12 are respectively arranged on the bracket 13, the first belt body 111 of the first conveyer belt 11 is made of air-permeable material (such as flexible filter cloth), is arranged on the outer side of the second conveyer belt 12 in a surrounding manner, and is used for supporting crude potassium nitrate materials; the second belt body 121 (optionally made of rubber with small deformation) of the second conveying belt 12 supports the first belt body 111 loaded with the coarse potassium nitrate material, and the second belt body 121 is provided with a liquid leakage hole 122; the vacuum drainage device 3 draws out the eluent through the drain hole 122; preferably, a material supporting roller 13 is arranged on the bracket 13 to support the second belt body 121 to keep the material conveying section horizontally arranged. Based on the supporting effect of the second conveyor belt 12 on the first conveyor belt 11, the stress of the first belt body 111 is reduced, the filtration effect is prevented from being reduced due to the stress (the size of the ventilation structure is increased due to the overlarge stress), and the filtration effect is ensured; and based on the first belt 111 being flexible and breathable, when in operation, the first belt 111 is attached to the second belt 121 (preferably, the second belt 121 is provided with a flow guiding structure to facilitate liquid discharge), so that the shower liquid is better in effect and more thoroughly pumped out.

In some embodiments, as shown in fig. 4 and 5, the rinsing device 2 comprises a liquid distribution pipe 21 and a liquid supply pump 22; the liquid supply pump 22 is used for conveying the leaching solution pumped out by the vacuum liquid discharge device 3 to the liquid distribution pipe 21; the liquid distribution pipe 21 is arranged above the feeding device 1, and the liquid distribution pipe 21 is provided with a liquid outlet. Preferably, a liquid receiving disc is arranged below the liquid outlet of the liquid distribution pipe 21, and the leacheate flowing from the liquid distribution pipe 21 flows to the feeding device 1 through the liquid receiving disc 23, so that the fluid output by the liquid distribution pipe 21 is buffered based on the arrangement of the liquid receiving disc (or liquid receiving plate), and the condition that the leacheate is directly sprayed on materials to break up the materials and influence the subsequent leaching is avoided.

In the above embodiment, as shown in fig. 5, the extending direction of the liquid distribution pipe 21 is perpendicular to the feeding direction of the feeding device 1; the liquid outlet has a plurality ofly along cloth liquid pipe 21 extending direction equipartition, improves the drip washing homogeneity of drip washing to crude potassium nitrate based on the setting of a plurality of liquid outlets. A control valve is arranged on the liquid inlet pipe of the liquid distribution pipe 21 to control the amount of the leaching liquid.

In some embodiments, as shown in fig. 4, a vacuum drainage device is arranged at the feeding end of the feeding device 1 to drain the eluent; at this time, the liquid outlet of the vacuum liquid discharge device 3 is communicated to the outside.

Claims

1. The crude potassium nitrate purification system is characterized by comprising a feeding device (1), a leaching device (2), a vacuum liquid discharging device (3) and a vacuumizing device (4);

the feeding device (1) is a horizontal material conveying section from a feeding end to a discharging end;

the number of the leaching devices (2) is multiple, and leaching liquid outlets of the leaching devices (2) are arranged above the feeding device (1) from the feeding end to the discharging end of the feeding device (1);

the number of the vacuum liquid draining devices (3) is more than one, each vacuum liquid draining device (3) is respectively used for pumping out the leacheate which is leached by the leaching device (2) on the feeding device (1), and the pumped-out leacheate is used as the feed of the previous leaching device (2) so as to form the reverse flow of the leacheate and the material conveying direction of the feeding device (1);

the vacuumizing device (4) is connected with each vacuum drainage device (3) and is used for providing a vacuum environment for the vacuum drainage devices (3).

2. The crude potassium nitrate purification system according to claim 1, characterized in that the vacuum drain (3) comprises a vacuum tank (31) and a liquid collecting device (32);

the feeding port of the vacuum tank (31) is connected to the liquid outlet end at the bottom of the feeding device (1) through a pipeline, the air inlet of the vacuum tank (31) is communicated to the vacuumizing device (4) through an air inlet pipeline, and the liquid outlet of the vacuum tank (31) is communicated to the liquid collecting equipment (32) through a liquid outlet pipeline;

-liquid in the liquid collecting device (32) is used as feed for the rinsing device (2); the vacuumizing and draining processes of the vacuum tank (31) are staggered.

3. A crude potassium nitrate purification system according to claim 2, characterized in that control valves are provided on the inlet and outlet pipes of the vacuum tank (31), respectively.

4. The crude potassium nitrate purification system according to claim 1, wherein the feeding device (1) comprises a first conveyor belt (11), a second conveyor belt (12) and a support (13);

the first conveying belt (11) and the second conveying belt (12) are respectively arranged on the bracket (13), the first belt body (111) of the first conveying belt (11) is made of a breathable material, is annularly arranged on the outer side of the second conveying belt (12), and is used for supporting a crude potassium nitrate material;

a second belt body (121) of the second conveying belt (12) supports the first belt body (111) loaded with the crude potassium nitrate material, and a liquid leakage hole (122) is formed in the second belt body (121); the vacuum drainage device (3) extracts the eluent through the liquid leakage hole (122).

5. A crude potassium nitrate purification system according to claim 1, characterized in that the number of leaching devices (2) is 5.

6. The crude potassium nitrate purification system according to claim 1, characterized in that the leaching device (2) comprises a liquid distribution pipe (21) and a liquid feed pump (22);

the liquid supply pump (22) is used for conveying the leaching solution pumped out by the vacuum liquid discharge device (3) to the liquid distribution pipe (21);

the liquid distribution pipe (21) is arranged above the feeding device (1), and the liquid distribution pipe (21) is provided with a liquid outlet.

7. The crude potassium nitrate purification system according to claim 6, wherein the direction of extension of the liquid distribution pipe (21) is perpendicular to the feeding direction of the feeding device (1); the liquid outlets are uniformly distributed along the extending direction of the liquid distribution pipe (21).

8. The crude potassium nitrate purification system according to claim 6, wherein a control valve is provided on the liquid distribution pipe (21).

9. The crude potassium nitrate purification system according to claim 1, characterized in that the evacuating means (4) is a vacuum pump.

10. The crude potassium nitrate purification system according to claim 1, characterized in that the feeding end of the feeding device (1) is provided with the vacuum drainage device (3) for draining the leaching solution.